<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>javascript标识符</title>
</head>
<body>
<script>
    //这是定义一个变量
    var name = "李四";
    /*
    展示数据在页面中
     */
    document.write(name)

</script>

</body>
</html>